Please read before wondering why I put age 13 and up.
I picked up Mortal Kombat X the day it came out, and have pretty much been playing it ever since. The game is very off putting by the way the media likes to talk about it. All the media likes to talk about is violence. That's it. Is the violence bad? Well, of course it is. It's Mortal Kombat. But one thing that people need to learn how to do is look past the violence in some games and realize that behind the violence, there is, often times, a very good game. That is the case for Mortal Kombat X. When you look past the violence, there is an excellent beginner and hardcore fighting game hidden beneath it.
The gameplay is some of the smoothest I've ever seen in a 2D fighting game. It performs excellently on my Xbox One, and from what I've heard, it performs excellently on the PS4 as well. The character balance is great, and I have yet to find out which character is absolutely overpowered (maybe Shinnok). The combos are relatively simple to perform, especially if you are new to fighting games. Mortal Kombat is probably one of the best fighting games to introduce to a person new to the genre, because it's probably the simplest of its kind.
I'm not going to go into any game modes, as this is a website designed for parents seeing whether things are age appropriate or not. Parents, I wholeheartedly understand if you don't want your kid to get this game. It is as violent as everyone makes it out to be. But remember, Mortal Kombat may be famous for its blood and gore, but one of the key ways to getting a video game famous is by being a good game. Mortal Kombat is famous because it's just excellent. My little brothers play it for that very reason. They love it because it is fun, and they are diving deeper into the gameplay and figuring out the complexity and technique hidden under all the simplicity. Sure, they might find the blood and guts amusing, but they play it because it's a fun game. We didn't pay 60 dollars for blood and gore.
I would encourage your kids to look past the violence in some video games, because when you do, you end up having a very good game.
One more thing before I close. I have a recommendation for any parent not wanting their kids to get Mortal Kombat X. If you child has an Xbox 360 or a PS3, there is another Mortal Kombat game on it that's just called "Mortal Kombat." What makes this game stand out is that there is an option to turn off blood and gore. Turning off blood and gore also turns off fatalities, which are brutal finishing moves that you can pull off with a certain button combination. Mortal Kombat X does not have this option. This Mortal Kombat game that I described is excellent as well, and received generally positive reviews and was praised by the fans of the franchise upon its release.